BSOD - BCCode: 1000007e - atikmdag.sys

I've recently had my computer give me a few strange crashes; twice while playing Champions Online but several days apart, it just froze up, gave a graphical glitch, sound stuttering and computer restarted. Then finally, I got an actual blue-screen, giving several error codes and also referencing the file atikmdag.sys. After doing some checking around, I saw a fix that involved reinstalling the drivers, going in and manually expanding atikmdag.sy_ and replacing it. Obviously by the fact that I'm here, this didn't work, and it happened outside the game while just watching a full screen video. This time on restarting I actually got a pop-up listing the codes:

Hi, as you can see your dump file is blaming the actual GPU driver. Try this, uninstall the GPU driver using this application as it will remove any other old bits of driver lying around from previous driver installs:http://www.wagnardmobile.com/DDU/ Re-install the latest WHQL driver version:http://support.amd.com/en-us

Thank you for the advice, I'll give it a shot when I get home tonight and let you know. With how infrequent the problems occured I'd like to give it a while before confirming but that sounds very helpful.